I watched this movie in a Korean audio and an English subtitle on ASTRO TVN. In short,

The gangster died. The comfort lady died. The musician was heavily wounded and died. His daughter survived. And finally Song Joong Ki.. he lived. And escaped with other Koreans on a ship freighted with coal.

There you have it, WikiMinci. 

From left : Gangster, musician and daughter, SONG JOONG KI, comfort lady

WHAT HAPPENED?

This took place in a war. Koreans were deceived into working overseas with good pay only to discover that they were forced labour in a mine. Working condition was horrible and any attempts to escape were foiled.

The ladies and young girls on the other hand were sent to comfort houses. It tugged my heart to see the young Sochee (musicians daughter) trying her best to escape from sexual predators.

The visuals in this movie are quite graphic and violent.For instance, a bayonet prodding through a young boys stomach, twisted several times with the boy screaming until he died. Like literally in front of your very eyes. No censorship whatsoever.